Load Specifications
Load data in caliber .270 WSM with .277 | 140gr | Remington SP Extended-Range BT bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Winchester StaBALL HD and IMR 7828 SSC.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 56,347 psi | 88% | 2953 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 57,580 psi | 90% | 2986 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,420 psi | 88% | 3087 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 94% | 57,203 psi | 90% | 3084 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 57,319 psi | 90% | 2930 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,565 psi | 89% | 3018 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 94% | 54,404 psi | 85% | 3018 fps | 97.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,342 psi | 77% | 2913 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 44,686 psi | 70% | 2887 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,681 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,462 psi | 85% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,507 psi | 89% | 3012 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,621 psi | 86% | 3025 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,767 psi | 87% | 3005 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 3061 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,231 psi | 88% | 3100 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 57,232 psi | 90% | 3064 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 2999 fps | 97.7% |
| Bofors RP5 | <<locked>> | 94% | 54,621 psi | 86% | 3025 fps | 98.8% |
| Bofors RP7 | <<locked>> | 84% | 55,883 psi | 88% | 2920 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,041 psi | 85% | 3002 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 54,592 psi | 86% | 2969 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 56,956 psi | 89% | 2976 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 92% | 54,607 psi | 86% | 2956 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,884 psi | 89% | 2995 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,551 psi | 90% | 2949 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,940 psi | 85% | 3120 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 84% | 54,375 psi | 85% | 2999 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 59% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,637 psi | 89% | 2949 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,478 psi | 89% | 2933 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 57,159 psi | 90% | 2969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,666 psi | 87% | 2940 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 96% | 56,057 psi | 88% | 3058 fps | 98% |
| Lovex S065 | <<locked>> | 84% | 54,824 psi | 86% | 2894 fps | 99.9% |
| Lovex S070 | <<locked>> | 86% | 56,231 psi | 88% | 2940 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,508 psi | 90% | 3005 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 40,814 psi | 64% | 2828 fps | 97.1% |
| Norma MRP | <<locked>> | 92% | 54,505 psi | 85% | 3051 fps | 99.6% |
| Norma URP | <<locked>> | 86% | 55,201 psi | 87% | 2963 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,695 psi | 89% | 3077 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 57,188 psi | 90% | 3015 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,172 psi | 86% | 3015 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,392 psi | 90% | 3031 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,739 psi | 89% | 3002 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,331 psi | 85% | 3022 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,520 psi | 85% | 3120 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 90% | 54,737 psi | 86% | 2933 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 92% | 56,202 psi | 88% | 3002 fps | 99% |
| Rottweil R 907 | <<locked>> | 84% | 55,883 psi | 88% | 2920 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,824 psi | 86% | 2894 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 56,231 psi | 88% | 2940 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,753 psi | 89% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,130 psi | 90% | 2890 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,753 psi | 87% | 2999 fps | 98.9% |
| Somchem S355 | <<locked>> | 82% | 57,043 psi | 89% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,405 psi | 88% | 2927 fps | 97.3% |
| Somchem S365 | <<locked>> | 88% | 55,448 psi | 87% | 2969 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,072 psi | 89% | 2979 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 54,621 psi | 86% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,768 psi | 89% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,188 psi | 88% | 2953 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 86% | 56,159 psi | 88% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,724 psi | 87% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,302 psi | 85% | 3035 fps | 97.3% |
| Vihtavuori N565 | <<locked>> | 98% | 54,563 psi | 86% | 3022 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,767 psi | 87% | 2904 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,781 psi | 86% | 2972 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,362 psi | 88% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,507 psi | 89% | 2966 fps | 98.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 37,144 psi | 58% | 2592 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 48,037 psi | 75% | 2831 fps | 99.9% |
| Accurate High Country | 57.6 gr | 84% | 43,830 psi | 69% | 2848 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 90% | 50,256 psi | 79% | 2963 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 54,128 psi | 85% | 2877 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,523 psi | 62% | 2684 fps | 95% |
| ADI AR 2213 | <<locked>> | 88% | 45,455 psi | 71% | 2844 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 96% | 43,787 psi | 69% | 2795 fps | 95% |
| ADI AR 2225 | <<locked>> | 92% | 35,607 psi | 56% | 2661 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,628 psi | 70% | 2818 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,923 psi | 80% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,581 psi | 62% | 2684 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 84% | 40,437 psi | 63% | 2743 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,751 psi | 54% | 2608 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,908 psi | 48% | 2516 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,666 psi | 59% | 2743 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 40,147 psi | 63% | 2736 fps | 95.3% |
| Bofors RP30 | <<locked>> | 94% | 42,946 psi | 67% | 2831 fps | 95.5% |
| Bofors RP5 | <<locked>> | 84% | 40,437 psi | 63% | 2743 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 49,763 psi | 78% | 2812 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 92% | 42,105 psi | 66% | 2762 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 48,298 psi | 76% | 2858 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 50,517 psi | 79% | 2864 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 48,167 psi | 75% | 2841 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 47,514 psi | 74% | 2828 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,844 psi | 67% | 2710 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 40,132 psi | 63% | 2818 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 47,572 psi | 75% | 2881 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 44% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,991 psi | 71% | 2743 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,357 psi | 79% | 2828 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 45,194 psi | 71% | 2766 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 46,934 psi | 74% | 2782 fps | 95.4% |
| IMR 7828 SSC | 58.1 gr | 88% | 43,816 psi | 69% | 2822 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 48,892 psi | 77% | 2792 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 47,413 psi | 74% | 2785 fps | 98.8% |
| Lovex S071 | <<locked>> | 80% | 32,721 psi | 51% | 2477 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 44,889 psi | 70% | 2779 fps | 96.5% |
| Norma 217 | <<locked>> | 96% | 36,361 psi | 57% | 2713 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 37,420 psi | 59% | 2703 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 46,253 psi | 72% | 2805 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 43,598 psi | 68% | 2828 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 44,860 psi | 70% | 2795 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 86% | 37,173 psi | 58% | 2657 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,008 psi | 45% | 1706 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,708 psi | 84% | 2979 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,123 psi | 74% | 2841 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,759 psi | 70% | 2848 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 35,070 psi | 55% | 2674 fps | 95% |
| Rottweil R 904 | <<locked>> | 82% | 43,250 psi | 68% | 2713 fps | 95% |
| Rottweil R 905 | <<locked>> | 80% | 39,175 psi | 61% | 2671 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 49,763 psi | 78% | 2812 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,892 psi | 77% | 2792 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 47,413 psi | 74% | 2785 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,447 psi | 84% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,979 psi | 75% | 2740 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,899 psi | 61% | 2667 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 53,838 psi | 84% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 47,036 psi | 74% | 2759 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 43,395 psi | 68% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,059 psi | 63% | 2661 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 80% | 51,532 psi | 81% | 2795 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,543 psi | 75% | 2795 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 37,057 psi | 58% | 2585 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 47,108 psi | 74% | 2802 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 39,131 psi | 61% | 2690 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 88% | 47,819 psi | 75% | 2913 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 92% | 45,484 psi | 71% | 2854 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,180 psi | 72% | 2753 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,486 psi | 76% | 2861 fps | 98.8% |
| Winchester StaBALL HD | 54.3 gr | 80% | 31,604 psi | 50% | 2638 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 84% | 41,365 psi | 65% | 2690 fps | 95.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 79 powders for .270 WSM loaded with the .277 | 140gr | Remington SP Extended-Range BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,146 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,146 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Accurate High Country, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for .270 WSM with the .277 | 140gr | Remington SP Extended-Range BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, Baschieri & Pellagri 109, IMR 8133 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.